Locomotive structure



Aug. 21, 1934.. K. s. HOWARD LOCOMOTIVE STRUCTURE Filed June 26, 1931 3Sheets-Sheet 1 Aug. 21, 1934. K. s. HOWARD LOCOMOTIVE STRUCTURE Filed June 26. 1931 3Sheets-Shee t 2 W e/Var fir/ 5. //0/mra Aug. 21, 1934. K. s. HOWARD LOCOMOTIVE STRUCTURE Filed June 26, 1931 sshets-sheet a Wren/0)" Patented Aug. 221, i934 LOCOMOTIVE STRUCTURE V vKarl S. Howard, St. Louis, Mo., assignor to General Steel Castings Corporation, Granite City, 111., a corporation of Delaware Application June 26, 1931, Serial No. 547,137

' 18 .Claims. (01. 105-44) ways for the latter, boiler support, and other associated structure.

In the usual cylinder saddle structure, the

exhaust steam passageways from the valve chambers to the exhaust nozzle form a substantially continuous member between the valve chambers. This member is rigid and is tied to the saddle and main frame members by virtue of its integral structure or of its securing elements. a

The exhaust passageways are subjected to alternate heating and cooling by the intermittent passage of the steam from the cylinders to the exhaust nozzle, depending on the operation of the locomotive, whilethe saddle and frame members are substantially of uniform temperature, approximately atmospheric temperature. This condition causes internal strains in the various parts of the casting, which strains have been found to be of considerable magnitude.

The main object of the invention is to provide a structure in which such strains are relieved or eliminated. In a co-pending application Serial No. 5l'7,l36, filed June 26, 1931, having the same general object, there is disclosed a saddle structure in which the exhaust steam passageways extend through openings in the side walls of the saddle and suitable plates are provided at the bottom of the smokeboxand surrounding the inner ends of the. exhaust steam passageways toexclude air from thesmokebox, the exhaust steam passage ways being exposed to external air substantially The general object indicated above may be attained by separating the inner ends of the ex- 4.5 haust steam passageways from each other or by otherwise arranging them so as to avoid any rigid connection between vtheir main body portions where they enter the smokebox. In the drawings which illustrate the invention s Figure 1 is, in part, a top view and, impart-a:

horizontal section on the line 11 of Figure 2 showing a locomotive boiler support and cylinder casting embodying one form of the invention.

Figure 2 is a partial front view and partial vertical'section taken on the line 22 of Fig,- ure 1.

Figure 3 corresponds to Figure 1 but illustrates another'form of the invention.

Figure. 4 is a vertical transverse section and elevation taken on the line 4-4 of Figure 3.

Figure 5 is a vertical longitudinal section taken on the line 5-5 of Figure 4.

Figure 6 is in part a top view and in part a horizontal section illustrating another modification.v

Figures 7 and 8 are detail vertical sections taken on the lines 7'7 and 88, respectively, of Figure 6.

Figure 9 is in part a top view and in part a horizontal section illustrating another modifica- 7 tion;

Figure 10 is a detail section illustrating another modification.

The locomotive frame or bed 1 is shown as formed integrally with main steam cylinders 2, valve chambers 3, and the smoke'box support l. The weight of the bed is carried on-the usual locomotive leading truck through an integral center bearingplate 5. The support 4 is box shaped and includes front wall 6, side walls 7, and back wall 8, all having top flanges 12 for mountingthe smokebox. The top member 9 of the locomotive bed forms a bottom wall of the support 4. Cored openings 10 and 11 in the walls 6 and 8 facilitate molding and permit access to the underside of the exhauststeam passageways 14, 15, 16, and 17. These holes are closed by means of plates welded in place after the casting iscompleted so that the-walls and bottom'plate are imperforate in the finished structure.

The front and rear walls 6 and 8 of the support merge with the side walls 7 and with the steam pasageways 14, l5, l6, and'l'l by'means of arcuate sections 13 of substantial radii whereby the' side walls may have some lateral movement,-under the influence of expansion in the passageways, without unduly stressing the front and rear walls of the support and without tendingto crack the connection between the side walls and transverse walls.

The exhaust steam passageways are integral with the side walls 7 and extend substantially horizontally. inwardly fromthe valve chambers 3 through the support side walls 7 and then curve upwardly and project into the smokebox. The two passageways leading from the ends of one valve. chamber merge with each other near their intersection with the side wall 7, but each merged passageway 30 continues'throughout its length independently of the corresponding passageway from the other chamber. Their terminals are substantially above the top of the central portion of the support and an inverted V shaped exhaust pipe member 22 rests on the ends of the passageways and is secured thereto by means of bolts through holes or slots in the corresponding flanges 21 and. 23 and 29 and 24. An ordinary nozzle 25 rests on the top of the member 22 and is secured thereto by means of similar bolted flanges 26 and 27. Nozzle25 dis,- charges to the smoke stack (not shown) in the usual manner. The interengaging ends of pas-v sageways 30 and member 22 are provided with ball joints B to facilitate relative movement'between them.

A liner or cover 29, for reinforcing andprotecting the smokebox shell, overlies the lower.

portions 28 of the smolgebcx shell resting on the flanged tops of the upright walls of the support a. Preferably this cover is formed of two main parts welded together along the longitudinal center line of. the locomotive. The exhaust passageways extend through a hole in the cover plate 29, fIhe inner edges of the hole in cover 29 are spaced from the outer walls of the passageways and the space between the passageways 30 is closed by a plate 33 secured to cover plate 29. On previous structures the corresponding liner was provided with an opening as large'a's the area between the upright walls of the sup port because a web was provided at the top of the su port between th upright walls, which web was adapted to receive the hot ashes do: posited in the smokebox.

Due to the novel constructionand shaping of the support and passageways and the spaces between the passageways 30 and plates and 3 l f t a ew vsm e pen f y in any direction without unduly straining the casting' The open top ofthefsupport portion of-the casting facilitates the removal of core sand'and also the inspection and repair of the undersides of the exhaust passages during the process of manufacture. v

In the modification shown in Figures 3, l, and 5,the cylinder saddle including thssmokebox support is in the form of a cast unit applied to the usual locomotive main frame side members so. --'I-h e cylinders 41, valve chambers 12, and exhaust steam passageways e3 are integral with each other and the inner upper ends of the pasg t s 43 m rge with, a h pag s nd cated at fi l. The smokebox support-has side walls to and front and "rear walls 46 and 47, respectively, corresponding to the saddle of Figures 1 and 2. The bottom wall 48 of the support extends from cylinder to cylinder and is provided with de pending webs 49 braced from the cylinders 41 and adapted to be bolted to themain side frames in the usual manner. p

The merged portion 44 of'the steam passage ways 43 is spaced a substantial distance above the top of their outer horizontal portions and this arrangement, together with'theoiiset cone t p o th sup ort is substant al y l l ed.

by m an o w i o liner plates ov rl n t i ner' dses of the smos b s Sheets 5:3 a

Z welded together along the longitudinal center together at c near their outlet portions and are curved about a horizontal radius substantially throughout their length to accommodate expansion without excessive strains in the saddle "structureand'without afiecting the spacing of the "steam chamber-s56.

The exhaust passageways 78 leading from the front end of the chambers 56 have a reverse curveanditerminate in outlet portions merged with the, corresponding portions of passageways 55: --Theselfro it passageways "18 do not merge with the side walls "57 of the saddle but extend through openings 59 provided in the sidewalls similar to other structures described in my co pending application Serial No. 54 7436.

extending the rear passageways 55 through the corner portions of the saddle, the joint between the side and rear walls of the saddle is relieved or expansion strains. By placing the irontpassageways 78 through openings in the sidewalls oi the saddle, the front corners are relieved of similar strains.

Thisconstruction is made possible by the use of a transverse beam consisting of the top wall 54 of the bedand lateral extensions 54a thereof which cooperate with vertical webs 54b to mount and support thecylinders and supply cham} bers 56 independently of the. boiler-supporting and 5 exhaust-passageway-containing poi-non of the saddle} This structure is-more specifically described and claimed in my 'copending' application Serial N0. 547,136; I V

In the somewhat similar modification shown in Figure 9, both of thepassagew'ays 60 and '61 on' oneside of the saddle extend through an elongated opening 62 provided in "the corner formedby sidewall 63 and front wall 64 of the saddle. The passageways-60 and 61 on one side lOO of the saddle merge with each other before the I longitudinalcente'r lineof the saddle is reached andthe corresponding passageways 66 and 67 on the other side of the saddle similarly merge ontheother side of the center line. 'All of 'the passageways then merge with each otherin the outlet se on s passageways am 6 enter the'saddle through an opening at the rear corner-and the; complete'passageway structure ern a sisu le c ve adi mn the Supply chamber as on one side of the saddle to the sup yfoha inbe r on the other side of the" saddle; -This-provid'es arcs of relatively large radius ior accommodating the expansion tend encie softhe heated walls of the steam passagewa s:

tions ififandfl l of "the; exhaust passageways.

This construction provides theexhaust member with a greater degree of flexibility and thereby nior readilyaccommodates substantial movement'of eie ass'ageway outlets73 and 74.

figure 10 illustrates an inverted v-shaped starter Each of' the above describedstructures isa saddle casting which extends from. side' to. side of the locomotive and includes the opposite. main steam cylinders in an integral structure. It is common'practice to form cylinder. and smokeb'ox saddles in two halves adapted to be bolted to.-

gether either along the longitudinal center line tractin'g tendencies as well a'siffrom expansion tendencies. Anotherstructuredirectedtowards the same general result and .embodyingsomeT of the features .illustratedihereinis covered by af'copending application 3 6f E. f G. I Iallquistj and, myself, Serial No. 541,894, filed 'June 3, 1931, now Patent No. '1,8.64 ,73 .6,- issuedfJune .28, 1932. 1'Qbviouslyfvarious' other' modifications as to" details and differentcombinations of the particu- -lar. features may be made 1 without departing from the spirit of the invention and Icontemplate the exclusive use of all such variations and combinations as come within the scope' of my claims.

I claim-- 7 1. In a locomotive, a smokebox support, and fluid passageways rigid with the sides of said support and extending therethrough and upr-wardly and then merging with each other, the

inner portions of said passageways being free of other connections to said support within the support to relieve the structure of strains due to variations in temperature in said parts.

2. In a locomotive, a smokebox, a smokebox support having side and bottom walls forming an air excluding chamber beneath said smokebox, a plurality of fluid passageways extending through and rigid with certain of said walls,

,the inner portions of said passageways being *free of other connections with each other and with said walls within said closure to relieve the structure of strains due to variations in temperature in said parts. V

3. In a locomotive cylinder saddle, a rigid boiler support structure including a side wall, a fluid passageway rigid with and extending inwardly from said side wall and connected to said structure at its outer end only to relieve the structure of strains clue to variations in temperature in said parts.

rigidly connected at their lower ends only to said structure side walls to relieve the structure or. strains due to variationsin' temperaturein said parts.

'6. a locomotive structure, a sm'o'kebox,

spaced side walls .ior'mingfa 'sinokebox support, fluid. passageways Lextending' inwardly from and rigidly connectedto said wallsfand an exhaust pipe mount'ed on the inner lends offsaidpassage-'- ways, said exhaust pipe and' wallsbeing the only elements positioning the inner portions "of said passageways" whereby .the structure is relieved of 'strains, f, due. to variations. in. temperature saidpartsf j' f 7. In a locomotive structure, a smokebox' rigid I support, having a wall 'gand a fluid passageway extending through and rigidly connected tosaid' wall, the. inner. portionof said passageway extending inwardly and Iu'p'wa'rdiy irom'said'wall amusing free of other 'connec-,.

tions' to said support Itofrelie've ,the' 'structui'e of strains due to variations in temperature 'in" said parts. Y

.8; In a locomotive stru re, a I smoke'box walls forming asrnokebox rigid support, an'd a.

srel f i pas ways ex d hr and rigidly 'connected 'to certainofsaid walls, theinn'er portions of said passageways extending inwardly from said walls an'dbeing free ofi'oth e'r connections to said support'to relieve thestruc-L.

ture of strains due to variations. in temperature in said parts. I

'9. In a locomotive structure, a smokebox rigid support having. side walls, and aplurality of ,fluid' passageways extending.. through and ligidly ffconnected 'to' certai'n of ".sai'd'. walls, the inner portions of said passageways" extending inwardly and upwardly from said walls, and being spaced from each other and free of other connections to said support to relieve the structure of strains due to variationsin temperature in said parts.

10. In a locomotive structure, a smokebox support having walls, and fluid passageways extending from opposite sides through said walls and rigidly connected thereto, the inner portions of said passageways extending inwardly and upwardly and merging at a point'substantially at the level of the center of the top of said support, and: said inner portions being spaced and disconnected from the remaining parts of the smokebox support to relieve the structure of strains due to variations in temperature in said parts.

11. In a locomotive structure, a smokebox support member, valve chambers, and fluid passageways leading from said chambers through.

said member, said passageways having horizontal portions rigid with and extending inwardly from said support and having curved portions extending upwardly through said support and being spaced from each other for a substantial distance above the level of the tops of a said horizontal portions to relieve the structure ofstrams due to variations in temperature in said parts.

12. In a locomotive cylinder saddle structure,-

valve chambers, upright webs forming the sides and ends of a boiler support, and fluid passage-. ways extending from the exterior of said support at each side thereof to the interior thereof and then merging in an outlet portion whereby.

3 In mmm m ylinsie sa -Idl struqt re, valve chambers, upright webs forming the sidg and ems. Qt a, 91 s np rrh an l d. n agway' eatendm rom said'chamhers t the in iqr 9 S iiq rsu a t. and mer mawim each 9,. :11 an' jut ti PQII Qnj he eb cqn inuQns. I i fro med. etween i hambers @52 tea 0? said nassagfiwaysieat ndin thmush. he. aviia n QQIiifiE bfitweQni aid We 's. w th th qlap n w l a at said pas ageways mer ilg with Eh @Qmnt o ti ns. 9 aid id an en 9$ respectively whereby adirect coiinegqt iqn he} sai bs adiacs t. said pas way i avqifi d re ve t r lctur fiifaip 1 .19 q'v r afiion 'ing em er tq re in aid t .1 1 a, qsQx otive in ex s ddl stru tu valve cha het ompnq te. ei sjq the eafllq g. nd "a. ont nuou flu d. cn xtfi x n' 'w n y flichambsrss in t efio m. Q rever curv whereby fiaid 'Qndu t may e pand. r c914: tract without forcing said chambets apart.

. In; mqiiye qy nsiq saddl fit u tum, m h weeks t in n @QQHQETSQQPQYE beam.

a termediate their ends to relieve thgetmc'tu're qj sjya ips dye tp va l ia tiops in tempel atulfe in Y E QPQ W:

' 1.6.; In. lbv m fii e c lind r a dle ulte,

uprig t ens. iq min i nt an ear a ls.

Y Qithe 29 em or valv chambe s on he da Q2 said. synmrt flu d nafiaeewws ex en gv 15mm ins Q 11. he s. v t lrq gh" an gg, rqv qeq thex rqr i 5 he. adiacenfi r ar tn "Q; sail weet). 29 .fi isl assa ew y aqia H me the 62 .1 2: of a d ham m 1. 5 an Pmmge n cl d, here or n he asil p1; xQnt qqrnler o saiq su q'rt a d. pas: a fle ys mer ing W tha h ther at the en er f Sale. mm: to, te m continuou membr u ne g qn ly qr Said. sunpjqrt F eliev the firimt Sn kes Qu t vari t qns ni w erm: in. aiqpa ts, 1 e

a qtivc. b il a$1. ..e,v as 12% main t m q d s outs de Q i ba rifimber qon ec i l one, e d; f a h 9; cxlmdex w thfsa d bas memb fieem ndi e h n an i i lv qq lm tfld Q Said c drfrom .ea h o e 'tnmugh ut he r ng h and. erm nafi ig iIlIQU LQ S. in; fi i-d mum-n p. inver ed. vfsn nea. exh ust pip qnfi. fle l leg wherebyfi e truk ture i r l eved Q fi ailns qlieItQ. v riations n temp rature in, 

